Vacuum brake



Aug. 14, 1928; 1,680,549

w. o. KENNINGTON VACUUM BRAKE Filed Nev. 16, 1927' 2 sheets-sheet 1 a 7 Z 1: r

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gnventcw 61cm my 1,680,549 w. o. KENNINGTON VACUUM BRAKE 2 Sheets-Sheet 2 Filed NOV. 16, 1927 gn'umfloz ufllamaia lan Patented Aug. 14, 1928.

-U-"N'ITE'D STATES This invention relates to the control of power-operated brakes or other mechamsm ln motor vehicles and has for its object to provide methods and meanswhereby' a simplification in control operations is secured The invention will be describedherelnafter as a plied by way of example to the control of rake mechanism, it being under= stood that it may be applied to other poweroperated' mechanism of vehicles.

The invention consists in control means for l power-operated mechanism including an auxiliary member embodied in or disposed adjacent an internal combustion accelerator member whereby positivemovement of the drivers hand or foot in an additional and immediately adjacent path to that traced during normal operation of the accelerator member; actuates mechanism controlling the power applied to the poweroperated mechanism. A

The invention further consists in control means for power-operated mechanism as set forth above wherelnsaid auxilia member comprises a stirrup associated with an accelerator edal lever which is connected both to the enginethrottle lever and to the poweroontrolling mechanism by .way of one-way connections.

The invention further consists in control means for power-operated mechanism as set forth above wherein said auxiliary memberprises a stirrup associated with an accele tor pedal lever connected to the engine throt le valve, which latter in addition to its rmal function is rendered capable of controlling the power derived from the engine suction. g

The invention maybe embodied in structure wherein, in place of the stirrup, other auxiliary members may be employed jor power controlling mechanlsm.

actuating the g The invention further consists in'control .means'for power-operated mechanism asset forth above wherein a reaction u on the auxiliary member dependingjupon t e' force exerted by the power-operated mechanism is produced. I g l 4 The invention also consists in control means for power-operated mechanism substantially as hereinafter {described with ref: erence toany of'the accompanying drawings.

Referring to the accompanyingdiagrammatic drawings; p

v gressive braking are in PATENT OFFICE.

wnmnu o. xmmmeron, or Lennon, momma. vacuum 3mm Application fled Iove mber is, we; semi at. seam,

main Great Britain September 11, was.

Figures 4, 5 and 6 illustrate diagrammatically three further modifications.

- In carrying the invention into efi'ect in one convenient form byway of example illustrated in Figure 1 as applied to the co-ntrol of brake mechanism of motor vehicles operatedfrom suction'derived from the induction system of the on he, I replace the normal accelerator peda by a stirrup 1 which will enable the pedal lever 2 to be lifted by the drivers foot beyond its normally fclosed position.

I arran e so that w en the lever 2 is lifted beyond the position it occupies in Figure lit serves vtooperate the valve device 3, thereby putting the brake-operating cdntrivance (e. g. a cylinder 4 and piston 5) into operation as described in my United States application, Ser. N o. 147 ,130', filed Nov. 8, 1926, for brake mechanism operated by suction. effected by roviding a block 6 loosely pivoted upon-t e lever 2, the rod 7 carrying a stop 8 and passing freely through the block 6.; A similar block 9 isassociated with a' rod 10 and stopll, the rod 10 bein to the throttle lever (not shown? By this meansoperation of the throttle y de ressing the stirrup 1 can take place wlthout br nfiing the valve device 3 into operation at a and likewise operation of the latter can be brought about without further move- I out of the throttle beyond its closed position.

"Suitable sprin (not shown) may be r0- vided to yrge th: accelerator lever 2 nto its normally closed position so that if the foot be moved from the pedal the latter .will always automatically. assume the position occupied in Figure 1.

It will be appreciated that according to this arrangement control of the motor :vehicle is extremely simple since acceleration. and normal running of the engine and proimmediate control connected This is without removal of the drivers foot from the accelerator pedal.

In some cases it is desirable that a certain measure of progressive reaction pressure be applied to the stirrup in order that the driver may more readily gauge the braking effort exerted at any moment. A convenient means of incorporating this action is illustrated in Figure 2 wherein a lever 12 is interp'osed between the connecting rod 13 and the brake rod 14, this lever being connected by a spring 15 at its remoteend with the lever 2. i

In this form of the invention the pull of rod 13 is divided by the lever 12, bein transmitted mainly to the brake through r0 14 but being in'part effective through s ring 15 upon the pedal 2 against the pull eing exerted upon this pedal by the foot in the stirrup.

In some cases when only a very slight reaction efi'ect is desired the effective area of the valve mechanism 3 may be reduced so that the force to be overcome in raising this member, say in Figures 1, 4, band 6, .is reduced. This detail is'tnot a part of this lnvention but is disclosed and described in my' application for vacuum brake Ser. No. 194,128, filed May 25, 1927. J

According to the modification illustrated in Figure 3 a stirrup is attached to the pedal 'shown in Figure 2 of the drawings accorm panying my U. S. Patent 4,541,266 .for vacuum operated brake, thus' enabling the throttle itself to be 0 erated beyond its closed osition. In t is case the spring 16 is ma e stronger than the spring17 so that the arm' 19 may normally rest against the stop 21.

According to a further modification illus-' trated in Figure 4 a heeland toe action is utilized to. operate the brake-operating lunger 22 and throttle-operating. plunger 5 3, a fixed or adjustable fulcrum rod 24 for the instep being provided as shown.

The plunger 22 actuates an arm 25 which is connected throu h a link 26am} bell .crank' lever 27 to the va ve device 3.=

The modification illustrated ilf bearing an arm 30 carrying pivoted blocks 31 and 32 which cooperate with rods 10 and 7 res ectivel insimilar fashion to that de-- 2. A suitable slot 40 is picte in Figure Figure 5' embodies a foot plate 28 hinged at 29 and formed in the toe board 50.to.admit of the necessary rocking movement of the arm 3.

Instead of providing a stirrup on the accelerator pedal a further pdal or lever may be disposed adjacent the accelerator pedal so as to be operable by the foot. without removing the latter from the accelerator pedal.

Such an arrangement is illustrated in Figure 6 wherein 23 represents a normal acce orator pedal lever adjacent which is mounted a lever 51 ivoted at 61 and connected at its remote en to valve mechanism 3 through a link 33 and bell crank lever 34. By this means lateral movement of the foot 'Wlll operate the valve mechanism 3 without effecting the throttle, while vertical movement will operate the throttle without affecting the valve mechanism 3.

Having now particularly described and ascertained the nature of my said invention \and in what manner the same is to be performed, I declare that what I claim is 1. Control means for power operated mmhanism including an auxiliary member associated with an internal combustion engine accelerator member wherebypositive manual movement in an additional and immediately adjacent path to that traced during normal operation of the accelerator member actuates mechanism controlling the power applied to the power operated mechanism and wherein said' auxiliary member comprises a stirrup associated with an accelerator pedal, which latter is connected both to the engine throttle lever and to the power controlling mechanism by one way connections.

2. In combination, means for controlling the fuel su pl of a motor, means for controlling a ra e manually operable mechanism operable in two directions, in one direction actuating'the fuel supply means and in the other 'direction actuating the brake control means, said brake control means including a floating lever, a tension link con nected to one arm 'of the lever for applying the brake and resilient means -connecting the other arm of the lever to the manually operable means to react on the latter in proportion to the force of brake application.

In testimony whereof I aflix my signature.

WILLIAM o. numerou- 

